The Crow and Mercury

A Crow caught in a snare prayed
to Apollo to release him, making
a vow to offer some frankincense
at his shrine. But when rescued
from his danger, he forgot his
promise. Shortly afterwards,
again caught in a snare, he
passed by Apollo and made the
same promise to offer
frankincense to Mercury. Mercury
soon appeared and said to him, "O
thou most base fellow? how can I
believe thee, who hast disowned
and wronged thy former patron?'